MAX3238IPWRG4 datasheet(9/19 Pages) TI1

Part #	MAX3238IPWRG4

Description	MULTICHANNEL LINE DRIVER/RECEIVER WITH ESD PROTECTION

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MAX3238

3V TO 5.5V MULTICHANNEL RS232 LINE DRIVER/RECEIVER

WITH ±15kV ESD (HBM) PROTECTION

SLLS349J − JUNE 1999 − REVISED MARCH 2004

9

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

PARAMETER MEASUREMENT INFORMATION

TEST CIRCUIT

50

Ω

Generator

(see Note B)

FORCEOFF

ROUT

FORCEON

Auto-

powerdown

Plus

INVALID

DOUT

DIN

CL = 30 pF

(see Note A)

2.7 V

−2.7 V

0.3 V

−0.3 V

0 V

Valid RS-232 Level, INVALID High

Indeterminate

If Signal Remains Within This Region

For More Than 30

µs, INVALID Is Low†

Valid RS-232 Level, INVALID High

† Auto-powerdown plus disables drivers and reduces

supply current to 1

µA.

NOTES: A. CL includes probe and jig capacitance.

B. The pulse generator has the following

characteristics: PRR = 5 kbit/s, ZO = 50 Ω,

50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns.

−2.7 V

Receiver

Input

−3 V

3 V

2.7 V

tvalid

VCC

0 V

INVALID

Output

3 V to 5 V

50%

0 V

50%

Driver

Input

≈5.5 V

Driver

Output

≈ −5.5 V

Supply

Voltages

tdis

ten

tdis

ten

V+

V−

V+ −0.3 V

V− +0.3 V

Voltage Waveforms and Timing Diagrams

tinvalid

V+

V−

Figure 5. INVALID Propagation-Delay Times and Supply-Enabling Time

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